Okay, for a quick first trial, here's the table for data input to the Editor App via Ratbuddyssey:
As mentioned before, while I tried my best, it is not possible to pick the exact anchor points because to do that I would need you actual REW files, the captured images you posted are only good as a rough guide. Obviously for the round numbers such as 70, 90, 100 Hz, my numbers will in fact be exact as I can see it just from the graphs you posted.
However, you can easily change the frequency anchor points from the rough/approx numbers in the table below, to the exact frequency when you look at the REW graphs yourself.
For example, the first one I picked is 21.5 Hz bump, on your actual graph it may be 23 Hz, so then you can simply read the SPL on the vertical scale and replace the 82.3 dB in the second column with whatever you see, say it is 83 dB, then the cut will become 83-80 = 3 dB instead of the 2.3 dB shown in my table.
The 80 Hz is my suggested reference SPL, that seems appropriate base on graphs you posted. After entering the data via Ratbudyssey to the subwoofer channel, you have save the .ady file in a name that you can easily identify later. Then load this file into the app (with my Galaxy android pad I could just copy the file to the appropriate folder) and when you can see it and open it with the App. You will then be able to see the new customized target curve. You can then do you thing such as disable MRC, limit EQ range to 300 Hz etc., and then just send it the AVR and then plot some REW graphs again.
When entering the dB to cut, be sure to enter
negative sign so it knows they are cuts.
Reference frequency point for cuts/boosts | 80 | |
| | |
Freq. anchor points | SPL at anchor freq. points | dB to cuts/boosts |
17 | 80 | 2.5 |
20 | 80.5 | 2 |
23 | 81 | 2 |
25.6 | 83 | -0.5 |
30 | 84 | -1 |
34 | 83.5 | -1 |
37 | 84 | -2 |
40 | 84 | -2 |
45 | 84 | -2.5 |
50 | 83.8 | -2.5 |
54.5 | 84 | -2.5 |
62 | 83.8 | -3 |
67 | 84.8 | -4 |
70 | 84 | -3.5 |
80 | 83 | -0.5 |
84 | 84 | -3.5 |
86.5 | 84 | -4 |
89 | 85 | -4.5 |
90 | 84.5 | -4.5 |
93.5 | 84.5 | -4.5 |
94 | 84.5 | -4.5 |
98 | 84 | -4 |
100 | 83.5 | -3.5 |
107 | 83 | -3 |
109 | 82.3 | -2.3 |
128 | 81 | -1 |
If you do everything right, the results may not be the best possible yet without a second trial, but it should be close enough that you will most likely see a flatter curve in the 20-120 Hz range. And if you want to stop there, then you simply have to do it one more time to get your house curve (or Harman curve) back easily. You can also try simply increasing the sub level trims by 3 dB and see if you like the effects. It all depends on how the customized curve looks like, you won't know until you use REW to plot the new FR curves.